Merge pull request raksha-life#397 from ashwinrajeev/master

add caching for mapdata

.env.example

@@ -2,4 +2,6 @@ SECRET_KEY=1
 ALLOWED_HOSTS=localhost
 SENTRY_DSN=""
 B_DATABASE_URL="postgres://rescueuser:password@localhost/rescuekerala"
+REDIS_URL=redis://localhost:6379
+CACHE_TIMEOUT=60
 DEBUG=true

floodrelief/settings.py

@@ -20,7 +20,8 @@ def get_list(text):
 
 env = environ.Env(
     # set casting, default value
-    DEBUG=(bool, False)
+    DEBUG=(bool, False),
+    CACHE_TIMEOUT=(int, 60)
 )
 # reading .env file
 root = environ.Path(__file__) - 2
@@ -108,6 +109,18 @@ def get_list(text):
 DATABASES = {}
 DATABASES['default'] = dj_database_url.parse(env('B_DATABASE_URL'), conn_max_age=600)
 
+CACHES = {
+    "default": {
+        "BACKEND": "django_redis.cache.RedisCache",
+        "LOCATION": env('REDIS_URL'),
+        "OPTIONS": {
+            "CLIENT_CLASS": "django_redis.client.DefaultClient"
+        },
+        "KEY_PREFIX": "keralarescue"
+    }
+}
+CACHE_TIMEOUT = env('CACHE_TIMEOUT')
+
 # Password validation
 # https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators
 

mainapp/views.py

@@ -13,6 +13,8 @@
 from django.contrib.auth import logout
 from django.shortcuts import redirect
 from django.db.models import Count
+from django.core.cache import cache
+from django.conf import settings
 
 class CreateRequest(CreateView):
     model = Request
@@ -168,11 +170,15 @@ class Maintenance(TemplateView):
 
 
 def mapdata(request):
-    if("district" in request.GET.keys()):
-        data = Request.objects.exclude(latlng__exact="").filter(district = request.GET.get("district")).values() 
+    district = request.GET.get("district", "all")
+    data = cache.get("mapdata:" + district)
+    if data:
+        return JsonResponse(list(data) , safe=False)
+    if district != "all":
+        data = Request.objects.exclude(latlng__exact="").filter(district=district).values()
     else:
         data = Request.objects.exclude(latlng__exact="").values()
-
+    cache.set("mapdata:" + district, data, settings.CACHE_TIMEOUT)
     return JsonResponse(list(data) , safe=False)
 
 def mapview(request):

requirements.txt

@@ -8,3 +8,4 @@ psycopg2==2.7.5
 pytz==2018.5
 raven==6.9.0
 whitenoise==4.0
+django-redis==4.9.0